1 /*- 2 * Copyright (c) 2002 Poul-Henning Kamp 3 * Copyright (c) 2002 Networks Associates Technology, Inc. 4 * All rights reserved. 5 * 6 * This software was developed for the FreeBSD Project by Poul-Henning Kamp 7 * and NAI Labs, the Security Research Division of Network Associates, Inc. 8 * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the 9 * DARPA CHATS research program. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. The names of the authors may not be used to endorse or promote 20 * products derived from this software without specific prior written 21 * permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 __FBSDID("$FreeBSD$"); 38 39 #include "opt_ddb.h" 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/devicestat.h> 44 #include <sys/kernel.h> 45 #include <sys/malloc.h> 46 #include <sys/bio.h> 47 #include <sys/sysctl.h> 48 #include <sys/proc.h> 49 #include <sys/kthread.h> 50 #include <sys/lock.h> 51 #include <sys/mutex.h> 52 #include <sys/errno.h> 53 #include <sys/sbuf.h> 54 #include <geom/geom.h> 55 #include <geom/geom_int.h> 56 #include <machine/stdarg.h> 57 58 #ifdef DDB 59 #include <ddb/ddb.h> 60 #endif 61 62 #ifdef KDB 63 #include <sys/kdb.h> 64 #endif 65 66 struct class_list_head g_classes = LIST_HEAD_INITIALIZER(g_classes); 67 static struct g_tailq_head geoms = TAILQ_HEAD_INITIALIZER(geoms); 68 char *g_wait_event, *g_wait_up, *g_wait_down, *g_wait_sim; 69 70 struct g_hh00 { 71 struct g_class *mp; 72 struct g_provider *pp; 73 off_t size; 74 int error; 75 int post; 76 }; 77 78 /* 79 * This event offers a new class a chance to taste all preexisting providers. 80 */ 81 static void 82 g_load_class(void *arg, int flag) 83 { 84 struct g_hh00 *hh; 85 struct g_class *mp2, *mp; 86 struct g_geom *gp; 87 struct g_provider *pp; 88 89 g_topology_assert(); 90 if (flag == EV_CANCEL) /* XXX: can't happen ? */ 91 return; 92 if (g_shutdown) 93 return; 94 95 hh = arg; 96 mp = hh->mp; 97 hh->error = 0; 98 if (hh->post) { 99 g_free(hh); 100 hh = NULL; 101 } 102 g_trace(G_T_TOPOLOGY, "g_load_class(%s)", mp->name); 103 KASSERT(mp->name != NULL && *mp->name != '\0', 104 ("GEOM class has no name")); 105 LIST_FOREACH(mp2, &g_classes, class) { 106 if (mp2 == mp) { 107 printf("The GEOM class %s is already loaded.\n", 108 mp2->name); 109 if (hh != NULL) 110 hh->error = EEXIST; 111 return; 112 } else if (strcmp(mp2->name, mp->name) == 0) { 113 printf("A GEOM class %s is already loaded.\n", 114 mp2->name); 115 if (hh != NULL) 116 hh->error = EEXIST; 117 return; 118 } 119 } 120 121 LIST_INIT(&mp->geom); 122 LIST_INSERT_HEAD(&g_classes, mp, class); 123 if (mp->init != NULL) 124 mp->init(mp); 125 if (mp->taste == NULL) 126 return; 127 LIST_FOREACH(mp2, &g_classes, class) { 128 if (mp == mp2) 129 continue; 130 LIST_FOREACH(gp, &mp2->geom, geom) { 131 LIST_FOREACH(pp, &gp->provider, provider) { 132 mp->taste(mp, pp, 0); 133 g_topology_assert(); 134 } 135 } 136 } 137 } 138 139 static int 140 g_unload_class(struct g_class *mp) 141 { 142 struct g_geom *gp; 143 struct g_provider *pp; 144 struct g_consumer *cp; 145 int error; 146 147 g_topology_lock(); 148 g_trace(G_T_TOPOLOGY, "g_unload_class(%s)", mp->name); 149 retry: 150 G_VALID_CLASS(mp); 151 LIST_FOREACH(gp, &mp->geom, geom) { 152 /* We refuse to unload if anything is open */ 153 LIST_FOREACH(pp, &gp->provider, provider) 154 if (pp->acr || pp->acw || pp->ace) { 155 g_topology_unlock(); 156 return (EBUSY); 157 } 158 LIST_FOREACH(cp, &gp->consumer, consumer) 159 if (cp->acr || cp->acw || cp->ace) { 160 g_topology_unlock(); 161 return (EBUSY); 162 } 163 /* If the geom is withering, wait for it to finish. */ 164 if (gp->flags & G_GEOM_WITHER) { 165 g_topology_sleep(mp, 1); 166 goto retry; 167 } 168 } 169 170 /* 171 * We allow unloading if we have no geoms, or a class 172 * method we can use to get rid of them. 173 */ 174 if (!LIST_EMPTY(&mp->geom) && mp->destroy_geom == NULL) { 175 g_topology_unlock(); 176 return (EOPNOTSUPP); 177 } 178 179 /* Bar new entries */ 180 mp->taste = NULL; 181 mp->config = NULL; 182 183 LIST_FOREACH(gp, &mp->geom, geom) { 184 error = mp->destroy_geom(NULL, mp, gp); 185 if (error != 0) { 186 g_topology_unlock(); 187 return (error); 188 } 189 } 190 /* Wait for withering to finish. */ 191 for (;;) { 192 gp = LIST_FIRST(&mp->geom); 193 if (gp == NULL) 194 break; 195 KASSERT(gp->flags & G_GEOM_WITHER, 196 ("Non-withering geom in class %s", mp->name)); 197 g_topology_sleep(mp, 1); 198 } 199 G_VALID_CLASS(mp); 200 if (mp->fini != NULL) 201 mp->fini(mp); 202 LIST_REMOVE(mp, class); 203 g_topology_unlock(); 204 205 return (0); 206 } 207 208 int 209 g_modevent(module_t mod, int type, void *data) 210 { 211 struct g_hh00 *hh; 212 int error; 213 static int g_ignition; 214 struct g_class *mp; 215 216 mp = data; 217 if (mp->version != G_VERSION) { 218 printf("GEOM class %s has Wrong version %x\n", 219 mp->name, mp->version); 220 return (EINVAL); 221 } 222 if (!g_ignition) { 223 g_ignition++; 224 g_init(); 225 } 226 error = EOPNOTSUPP; 227 switch (type) { 228 case MOD_LOAD: 229 g_trace(G_T_TOPOLOGY, "g_modevent(%s, LOAD)", mp->name); 230 hh = g_malloc(sizeof *hh, M_WAITOK | M_ZERO); 231 hh->mp = mp; 232 /* 233 * Once the system is not cold, MOD_LOAD calls will be 234 * from the userland and the g_event thread will be able 235 * to acknowledge their completion. 236 */ 237 if (cold) { 238 hh->post = 1; 239 error = g_post_event(g_load_class, hh, M_WAITOK, NULL); 240 } else { 241 error = g_waitfor_event(g_load_class, hh, M_WAITOK, 242 NULL); 243 if (error == 0) 244 error = hh->error; 245 g_free(hh); 246 } 247 break; 248 case MOD_UNLOAD: 249 g_trace(G_T_TOPOLOGY, "g_modevent(%s, UNLOAD)", mp->name); 250 error = g_unload_class(mp); 251 if (error == 0) { 252 KASSERT(LIST_EMPTY(&mp->geom), 253 ("Unloaded class (%s) still has geom", mp->name)); 254 } 255 break; 256 } 257 return (error); 258 } 259 260 static void 261 g_retaste_event(void *arg, int flag) 262 { 263 struct g_class *mp, *mp2; 264 struct g_geom *gp; 265 struct g_hh00 *hh; 266 struct g_provider *pp; 267 struct g_consumer *cp; 268 269 g_topology_assert(); 270 if (flag == EV_CANCEL) /* XXX: can't happen ? */ 271 return; 272 if (g_shutdown || g_notaste) 273 return; 274 275 hh = arg; 276 mp = hh->mp; 277 hh->error = 0; 278 if (hh->post) { 279 g_free(hh); 280 hh = NULL; 281 } 282 g_trace(G_T_TOPOLOGY, "g_retaste(%s)", mp->name); 283 284 LIST_FOREACH(mp2, &g_classes, class) { 285 LIST_FOREACH(gp, &mp2->geom, geom) { 286 LIST_FOREACH(pp, &gp->provider, provider) { 287 if (pp->acr || pp->acw || pp->ace) 288 continue; 289 LIST_FOREACH(cp, &pp->consumers, consumers) { 290 if (cp->geom->class == mp && 291 (cp->flags & G_CF_ORPHAN) == 0) 292 break; 293 } 294 if (cp != NULL) { 295 cp->flags |= G_CF_ORPHAN; 296 g_wither_geom(cp->geom, ENXIO); 297 } 298 mp->taste(mp, pp, 0); 299 g_topology_assert(); 300 } 301 } 302 } 303 } 304 305 int 306 g_retaste(struct g_class *mp) 307 { 308 struct g_hh00 *hh; 309 int error; 310 311 if (mp->taste == NULL) 312 return (EINVAL); 313 314 hh = g_malloc(sizeof *hh, M_WAITOK | M_ZERO); 315 hh->mp = mp; 316 317 if (cold) { 318 hh->post = 1; 319 error = g_post_event(g_retaste_event, hh, M_WAITOK, NULL); 320 } else { 321 error = g_waitfor_event(g_retaste_event, hh, M_WAITOK, NULL); 322 if (error == 0) 323 error = hh->error; 324 g_free(hh); 325 } 326 327 return (error); 328 } 329 330 struct g_geom * 331 g_new_geomf(struct g_class *mp, const char *fmt, ...) 332 { 333 struct g_geom *gp; 334 va_list ap; 335 struct sbuf *sb; 336 337 g_topology_assert(); 338 G_VALID_CLASS(mp); 339 sb = sbuf_new_auto(); 340 va_start(ap, fmt); 341 sbuf_vprintf(sb, fmt, ap); 342 va_end(ap); 343 sbuf_finish(sb); 344 gp = g_malloc(sizeof *gp, M_WAITOK | M_ZERO); 345 gp->name = g_malloc(sbuf_len(sb) + 1, M_WAITOK | M_ZERO); 346 gp->class = mp; 347 gp->rank = 1; 348 LIST_INIT(&gp->consumer); 349 LIST_INIT(&gp->provider); 350 LIST_INSERT_HEAD(&mp->geom, gp, geom); 351 TAILQ_INSERT_HEAD(&geoms, gp, geoms); 352 strcpy(gp->name, sbuf_data(sb)); 353 sbuf_delete(sb); 354 /* Fill in defaults from class */ 355 gp->start = mp->start; 356 gp->spoiled = mp->spoiled; 357 gp->attrchanged = mp->attrchanged; 358 gp->providergone = mp->providergone; 359 gp->dumpconf = mp->dumpconf; 360 gp->access = mp->access; 361 gp->orphan = mp->orphan; 362 gp->ioctl = mp->ioctl; 363 gp->resize = mp->resize; 364 return (gp); 365 } 366 367 void 368 g_destroy_geom(struct g_geom *gp) 369 { 370 371 g_topology_assert(); 372 G_VALID_GEOM(gp); 373 g_trace(G_T_TOPOLOGY, "g_destroy_geom(%p(%s))", gp, gp->name); 374 KASSERT(LIST_EMPTY(&gp->consumer), 375 ("g_destroy_geom(%s) with consumer(s) [%p]", 376 gp->name, LIST_FIRST(&gp->consumer))); 377 KASSERT(LIST_EMPTY(&gp->provider), 378 ("g_destroy_geom(%s) with provider(s) [%p]", 379 gp->name, LIST_FIRST(&gp->provider))); 380 g_cancel_event(gp); 381 LIST_REMOVE(gp, geom); 382 TAILQ_REMOVE(&geoms, gp, geoms); 383 g_free(gp->name); 384 g_free(gp); 385 } 386 387 /* 388 * This function is called (repeatedly) until the geom has withered away. 389 */ 390 void 391 g_wither_geom(struct g_geom *gp, int error) 392 { 393 struct g_provider *pp; 394 395 g_topology_assert(); 396 G_VALID_GEOM(gp); 397 g_trace(G_T_TOPOLOGY, "g_wither_geom(%p(%s))", gp, gp->name); 398 if (!(gp->flags & G_GEOM_WITHER)) { 399 gp->flags |= G_GEOM_WITHER; 400 LIST_FOREACH(pp, &gp->provider, provider) 401 if (!(pp->flags & G_PF_ORPHAN)) 402 g_orphan_provider(pp, error); 403 } 404 g_do_wither(); 405 } 406 407 /* 408 * Convenience function to destroy a particular provider. 409 */ 410 void 411 g_wither_provider(struct g_provider *pp, int error) 412 { 413 414 pp->flags |= G_PF_WITHER; 415 if (!(pp->flags & G_PF_ORPHAN)) 416 g_orphan_provider(pp, error); 417 } 418 419 /* 420 * This function is called (repeatedly) until the has withered away. 421 */ 422 void 423 g_wither_geom_close(struct g_geom *gp, int error) 424 { 425 struct g_consumer *cp; 426 427 g_topology_assert(); 428 G_VALID_GEOM(gp); 429 g_trace(G_T_TOPOLOGY, "g_wither_geom_close(%p(%s))", gp, gp->name); 430 LIST_FOREACH(cp, &gp->consumer, consumer) 431 if (cp->acr || cp->acw || cp->ace) 432 g_access(cp, -cp->acr, -cp->acw, -cp->ace); 433 g_wither_geom(gp, error); 434 } 435 436 /* 437 * This function is called (repeatedly) until we cant wash away more 438 * withered bits at present. 439 */ 440 void 441 g_wither_washer() 442 { 443 struct g_class *mp; 444 struct g_geom *gp, *gp2; 445 struct g_provider *pp, *pp2; 446 struct g_consumer *cp, *cp2; 447 448 g_topology_assert(); 449 LIST_FOREACH(mp, &g_classes, class) { 450 LIST_FOREACH_SAFE(gp, &mp->geom, geom, gp2) { 451 LIST_FOREACH_SAFE(pp, &gp->provider, provider, pp2) { 452 if (!(pp->flags & G_PF_WITHER)) 453 continue; 454 if (LIST_EMPTY(&pp->consumers)) 455 g_destroy_provider(pp); 456 } 457 if (!(gp->flags & G_GEOM_WITHER)) 458 continue; 459 LIST_FOREACH_SAFE(pp, &gp->provider, provider, pp2) { 460 if (LIST_EMPTY(&pp->consumers)) 461 g_destroy_provider(pp); 462 } 463 LIST_FOREACH_SAFE(cp, &gp->consumer, consumer, cp2) { 464 if (cp->acr || cp->acw || cp->ace) 465 continue; 466 if (cp->provider != NULL) 467 g_detach(cp); 468 g_destroy_consumer(cp); 469 } 470 if (LIST_EMPTY(&gp->provider) && 471 LIST_EMPTY(&gp->consumer)) 472 g_destroy_geom(gp); 473 } 474 } 475 } 476 477 struct g_consumer * 478 g_new_consumer(struct g_geom *gp) 479 { 480 struct g_consumer *cp; 481 482 g_topology_assert(); 483 G_VALID_GEOM(gp); 484 KASSERT(!(gp->flags & G_GEOM_WITHER), 485 ("g_new_consumer on WITHERing geom(%s) (class %s)", 486 gp->name, gp->class->name)); 487 KASSERT(gp->orphan != NULL, 488 ("g_new_consumer on geom(%s) (class %s) without orphan", 489 gp->name, gp->class->name)); 490 491 cp = g_malloc(sizeof *cp, M_WAITOK | M_ZERO); 492 cp->geom = gp; 493 cp->stat = devstat_new_entry(cp, -1, 0, DEVSTAT_ALL_SUPPORTED, 494 DEVSTAT_TYPE_DIRECT, DEVSTAT_PRIORITY_MAX); 495 LIST_INSERT_HEAD(&gp->consumer, cp, consumer); 496 return(cp); 497 } 498 499 void 500 g_destroy_consumer(struct g_consumer *cp) 501 { 502 struct g_geom *gp; 503 504 g_topology_assert(); 505 G_VALID_CONSUMER(cp); 506 g_trace(G_T_TOPOLOGY, "g_destroy_consumer(%p)", cp); 507 KASSERT (cp->provider == NULL, ("g_destroy_consumer but attached")); 508 KASSERT (cp->acr == 0, ("g_destroy_consumer with acr")); 509 KASSERT (cp->acw == 0, ("g_destroy_consumer with acw")); 510 KASSERT (cp->ace == 0, ("g_destroy_consumer with ace")); 511 g_cancel_event(cp); 512 gp = cp->geom; 513 LIST_REMOVE(cp, consumer); 514 devstat_remove_entry(cp->stat); 515 g_free(cp); 516 if (gp->flags & G_GEOM_WITHER) 517 g_do_wither(); 518 } 519 520 static void 521 g_new_provider_event(void *arg, int flag) 522 { 523 struct g_class *mp; 524 struct g_provider *pp; 525 struct g_consumer *cp, *next_cp; 526 527 g_topology_assert(); 528 if (flag == EV_CANCEL) 529 return; 530 if (g_shutdown) 531 return; 532 pp = arg; 533 G_VALID_PROVIDER(pp); 534 KASSERT(!(pp->flags & G_PF_WITHER), 535 ("g_new_provider_event but withered")); 536 LIST_FOREACH_SAFE(cp, &pp->consumers, consumers, next_cp) { 537 if ((cp->flags & G_CF_ORPHAN) == 0 && 538 cp->geom->attrchanged != NULL) 539 cp->geom->attrchanged(cp, "GEOM::media"); 540 } 541 if (g_notaste) 542 return; 543 LIST_FOREACH(mp, &g_classes, class) { 544 if (mp->taste == NULL) 545 continue; 546 LIST_FOREACH(cp, &pp->consumers, consumers) 547 if (cp->geom->class == mp && 548 (cp->flags & G_CF_ORPHAN) == 0) 549 break; 550 if (cp != NULL) 551 continue; 552 mp->taste(mp, pp, 0); 553 g_topology_assert(); 554 } 555 } 556 557 558 struct g_provider * 559 g_new_providerf(struct g_geom *gp, const char *fmt, ...) 560 { 561 struct g_provider *pp; 562 struct sbuf *sb; 563 va_list ap; 564 565 g_topology_assert(); 566 G_VALID_GEOM(gp); 567 KASSERT(gp->access != NULL, 568 ("new provider on geom(%s) without ->access (class %s)", 569 gp->name, gp->class->name)); 570 KASSERT(gp->start != NULL, 571 ("new provider on geom(%s) without ->start (class %s)", 572 gp->name, gp->class->name)); 573 KASSERT(!(gp->flags & G_GEOM_WITHER), 574 ("new provider on WITHERing geom(%s) (class %s)", 575 gp->name, gp->class->name)); 576 sb = sbuf_new_auto(); 577 va_start(ap, fmt); 578 sbuf_vprintf(sb, fmt, ap); 579 va_end(ap); 580 sbuf_finish(sb); 581 pp = g_malloc(sizeof *pp + sbuf_len(sb) + 1, M_WAITOK | M_ZERO); 582 pp->name = (char *)(pp + 1); 583 strcpy(pp->name, sbuf_data(sb)); 584 sbuf_delete(sb); 585 LIST_INIT(&pp->consumers); 586 pp->error = ENXIO; 587 pp->geom = gp; 588 pp->stat = devstat_new_entry(pp, -1, 0, DEVSTAT_ALL_SUPPORTED, 589 DEVSTAT_TYPE_DIRECT, DEVSTAT_PRIORITY_MAX); 590 LIST_INSERT_HEAD(&gp->provider, pp, provider); 591 g_post_event(g_new_provider_event, pp, M_WAITOK, pp, gp, NULL); 592 return (pp); 593 } 594 595 void 596 g_error_provider(struct g_provider *pp, int error) 597 { 598 599 /* G_VALID_PROVIDER(pp); We may not have g_topology */ 600 pp->error = error; 601 } 602 603 static void 604 g_resize_provider_event(void *arg, int flag) 605 { 606 struct g_hh00 *hh; 607 struct g_class *mp; 608 struct g_geom *gp; 609 struct g_provider *pp; 610 struct g_consumer *cp, *cp2; 611 off_t size; 612 613 g_topology_assert(); 614 if (g_shutdown) 615 return; 616 617 hh = arg; 618 pp = hh->pp; 619 size = hh->size; 620 g_free(hh); 621 622 G_VALID_PROVIDER(pp); 623 g_trace(G_T_TOPOLOGY, "g_resize_provider_event(%p)", pp); 624 625 LIST_FOREACH_SAFE(cp, &pp->consumers, consumers, cp2) { 626 gp = cp->geom; 627 if (gp->resize == NULL && size < pp->mediasize) { 628 cp->flags |= G_CF_ORPHAN; 629 cp->geom->orphan(cp); 630 } 631 } 632 633 pp->mediasize = size; 634 635 LIST_FOREACH_SAFE(cp, &pp->consumers, consumers, cp2) { 636 gp = cp->geom; 637 if (gp->resize != NULL) 638 gp->resize(cp); 639 } 640 641 /* 642 * After resizing, the previously invalid GEOM class metadata 643 * might become valid. This means we should retaste. 644 */ 645 LIST_FOREACH(mp, &g_classes, class) { 646 if (mp->taste == NULL) 647 continue; 648 LIST_FOREACH(cp, &pp->consumers, consumers) 649 if (cp->geom->class == mp && 650 (cp->flags & G_CF_ORPHAN) == 0) 651 break; 652 if (cp != NULL) 653 continue; 654 mp->taste(mp, pp, 0); 655 g_topology_assert(); 656 } 657 } 658 659 void 660 g_resize_provider(struct g_provider *pp, off_t size) 661 { 662 struct g_hh00 *hh; 663 664 G_VALID_PROVIDER(pp); 665 666 if (size == pp->mediasize) 667 return; 668 669 hh = g_malloc(sizeof *hh, M_WAITOK | M_ZERO); 670 hh->pp = pp; 671 hh->size = size; 672 g_post_event(g_resize_provider_event, hh, M_WAITOK, NULL); 673 } 674 675 #ifndef _PATH_DEV 676 #define _PATH_DEV "/dev/" 677 #endif 678 679 struct g_provider * 680 g_provider_by_name(char const *arg) 681 { 682 struct g_class *cp; 683 struct g_geom *gp; 684 struct g_provider *pp, *wpp; 685 686 if (strncmp(arg, _PATH_DEV, sizeof(_PATH_DEV) - 1) == 0) 687 arg += sizeof(_PATH_DEV) - 1; 688 689 wpp = NULL; 690 LIST_FOREACH(cp, &g_classes, class) { 691 LIST_FOREACH(gp, &cp->geom, geom) { 692 LIST_FOREACH(pp, &gp->provider, provider) { 693 if (strcmp(arg, pp->name) != 0) 694 continue; 695 if ((gp->flags & G_GEOM_WITHER) == 0 && 696 (pp->flags & G_PF_WITHER) == 0) 697 return (pp); 698 else 699 wpp = pp; 700 } 701 } 702 } 703 704 return (wpp); 705 } 706 707 void 708 g_destroy_provider(struct g_provider *pp) 709 { 710 struct g_geom *gp; 711 712 g_topology_assert(); 713 G_VALID_PROVIDER(pp); 714 KASSERT(LIST_EMPTY(&pp->consumers), 715 ("g_destroy_provider but attached")); 716 KASSERT (pp->acr == 0, ("g_destroy_provider with acr")); 717 KASSERT (pp->acw == 0, ("g_destroy_provider with acw")); 718 KASSERT (pp->ace == 0, ("g_destroy_provider with ace")); 719 g_cancel_event(pp); 720 LIST_REMOVE(pp, provider); 721 gp = pp->geom; 722 devstat_remove_entry(pp->stat); 723 /* 724 * If a callback was provided, send notification that the provider 725 * is now gone. 726 */ 727 if (gp->providergone != NULL) 728 gp->providergone(pp); 729 730 g_free(pp); 731 if ((gp->flags & G_GEOM_WITHER)) 732 g_do_wither(); 733 } 734 735 /* 736 * We keep the "geoms" list sorted by topological order (== increasing 737 * numerical rank) at all times. 738 * When an attach is done, the attaching geoms rank is invalidated 739 * and it is moved to the tail of the list. 740 * All geoms later in the sequence has their ranks reevaluated in 741 * sequence. If we cannot assign rank to a geom because it's 742 * prerequisites do not have rank, we move that element to the tail 743 * of the sequence with invalid rank as well. 744 * At some point we encounter our original geom and if we stil fail 745 * to assign it a rank, there must be a loop and we fail back to 746 * g_attach() which detach again and calls redo_rank again 747 * to fix up the damage. 748 * It would be much simpler code wise to do it recursively, but we 749 * can't risk that on the kernel stack. 750 */ 751 752 static int 753 redo_rank(struct g_geom *gp) 754 { 755 struct g_consumer *cp; 756 struct g_geom *gp1, *gp2; 757 int n, m; 758 759 g_topology_assert(); 760 G_VALID_GEOM(gp); 761 762 /* Invalidate this geoms rank and move it to the tail */ 763 gp1 = TAILQ_NEXT(gp, geoms); 764 if (gp1 != NULL) { 765 gp->rank = 0; 766 TAILQ_REMOVE(&geoms, gp, geoms); 767 TAILQ_INSERT_TAIL(&geoms, gp, geoms); 768 } else { 769 gp1 = gp; 770 } 771 772 /* re-rank the rest of the sequence */ 773 for (; gp1 != NULL; gp1 = gp2) { 774 gp1->rank = 0; 775 m = 1; 776 LIST_FOREACH(cp, &gp1->consumer, consumer) { 777 if (cp->provider == NULL) 778 continue; 779 n = cp->provider->geom->rank; 780 if (n == 0) { 781 m = 0; 782 break; 783 } else if (n >= m) 784 m = n + 1; 785 } 786 gp1->rank = m; 787 gp2 = TAILQ_NEXT(gp1, geoms); 788 789 /* got a rank, moving on */ 790 if (m != 0) 791 continue; 792 793 /* no rank to original geom means loop */ 794 if (gp == gp1) 795 return (ELOOP); 796 797 /* no rank, put it at the end move on */ 798 TAILQ_REMOVE(&geoms, gp1, geoms); 799 TAILQ_INSERT_TAIL(&geoms, gp1, geoms); 800 } 801 return (0); 802 } 803 804 int 805 g_attach(struct g_consumer *cp, struct g_provider *pp) 806 { 807 int error; 808 809 g_topology_assert(); 810 G_VALID_CONSUMER(cp); 811 G_VALID_PROVIDER(pp); 812 g_trace(G_T_TOPOLOGY, "g_attach(%p, %p)", cp, pp); 813 KASSERT(cp->provider == NULL, ("attach but attached")); 814 cp->provider = pp; 815 LIST_INSERT_HEAD(&pp->consumers, cp, consumers); 816 error = redo_rank(cp->geom); 817 if (error) { 818 LIST_REMOVE(cp, consumers); 819 cp->provider = NULL; 820 redo_rank(cp->geom); 821 } 822 return (error); 823 } 824 825 void 826 g_detach(struct g_consumer *cp) 827 { 828 struct g_provider *pp; 829 830 g_topology_assert(); 831 G_VALID_CONSUMER(cp); 832 g_trace(G_T_TOPOLOGY, "g_detach(%p)", cp); 833 KASSERT(cp->provider != NULL, ("detach but not attached")); 834 KASSERT(cp->acr == 0, ("detach but nonzero acr")); 835 KASSERT(cp->acw == 0, ("detach but nonzero acw")); 836 KASSERT(cp->ace == 0, ("detach but nonzero ace")); 837 KASSERT(cp->nstart == cp->nend, 838 ("detach with active requests")); 839 pp = cp->provider; 840 LIST_REMOVE(cp, consumers); 841 cp->provider = NULL; 842 if ((cp->geom->flags & G_GEOM_WITHER) || 843 (pp->geom->flags & G_GEOM_WITHER) || 844 (pp->flags & G_PF_WITHER)) 845 g_do_wither(); 846 redo_rank(cp->geom); 847 } 848 849 /* 850 * g_access() 851 * 852 * Access-check with delta values. The question asked is "can provider 853 * "cp" change the access counters by the relative amounts dc[rwe] ?" 854 */ 855 856 int 857 g_access(struct g_consumer *cp, int dcr, int dcw, int dce) 858 { 859 struct g_provider *pp; 860 int pr,pw,pe; 861 int error; 862 863 g_topology_assert(); 864 G_VALID_CONSUMER(cp); 865 pp = cp->provider; 866 KASSERT(pp != NULL, ("access but not attached")); 867 G_VALID_PROVIDER(pp); 868 869 g_trace(G_T_ACCESS, "g_access(%p(%s), %d, %d, %d)", 870 cp, pp->name, dcr, dcw, dce); 871 872 KASSERT(cp->acr + dcr >= 0, ("access resulting in negative acr")); 873 KASSERT(cp->acw + dcw >= 0, ("access resulting in negative acw")); 874 KASSERT(cp->ace + dce >= 0, ("access resulting in negative ace")); 875 KASSERT(dcr != 0 || dcw != 0 || dce != 0, ("NOP access request")); 876 KASSERT(pp->geom->access != NULL, ("NULL geom->access")); 877 878 /* 879 * If our class cares about being spoiled, and we have been, we 880 * are probably just ahead of the event telling us that. Fail 881 * now rather than having to unravel this later. 882 */ 883 if (cp->geom->spoiled != NULL && (cp->flags & G_CF_SPOILED) && 884 (dcr > 0 || dcw > 0 || dce > 0)) 885 return (ENXIO); 886 887 /* 888 * Figure out what counts the provider would have had, if this 889 * consumer had (r0w0e0) at this time. 890 */ 891 pr = pp->acr - cp->acr; 892 pw = pp->acw - cp->acw; 893 pe = pp->ace - cp->ace; 894 895 g_trace(G_T_ACCESS, 896 "open delta:[r%dw%de%d] old:[r%dw%de%d] provider:[r%dw%de%d] %p(%s)", 897 dcr, dcw, dce, 898 cp->acr, cp->acw, cp->ace, 899 pp->acr, pp->acw, pp->ace, 900 pp, pp->name); 901 902 /* If foot-shooting is enabled, any open on rank#1 is OK */ 903 if ((g_debugflags & 16) && pp->geom->rank == 1) 904 ; 905 /* If we try exclusive but already write: fail */ 906 else if (dce > 0 && pw > 0) 907 return (EPERM); 908 /* If we try write but already exclusive: fail */ 909 else if (dcw > 0 && pe > 0) 910 return (EPERM); 911 /* If we try to open more but provider is error'ed: fail */ 912 else if ((dcr > 0 || dcw > 0 || dce > 0) && pp->error != 0) 913 return (pp->error); 914 915 /* Ok then... */ 916 917 error = pp->geom->access(pp, dcr, dcw, dce); 918 KASSERT(dcr > 0 || dcw > 0 || dce > 0 || error == 0, 919 ("Geom provider %s::%s dcr=%d dcw=%d dce=%d error=%d failed " 920 "closing ->access()", pp->geom->class->name, pp->name, dcr, dcw, 921 dce, error)); 922 if (!error) { 923 /* 924 * If we open first write, spoil any partner consumers. 925 * If we close last write and provider is not errored, 926 * trigger re-taste. 927 */ 928 if (pp->acw == 0 && dcw != 0) 929 g_spoil(pp, cp); 930 else if (pp->acw != 0 && pp->acw == -dcw && pp->error == 0 && 931 !(pp->geom->flags & G_GEOM_WITHER)) 932 g_post_event(g_new_provider_event, pp, M_WAITOK, 933 pp, NULL); 934 935 pp->acr += dcr; 936 pp->acw += dcw; 937 pp->ace += dce; 938 cp->acr += dcr; 939 cp->acw += dcw; 940 cp->ace += dce; 941 if (pp->acr != 0 || pp->acw != 0 || pp->ace != 0) 942 KASSERT(pp->sectorsize > 0, 943 ("Provider %s lacks sectorsize", pp->name)); 944 if ((cp->geom->flags & G_GEOM_WITHER) && 945 cp->acr == 0 && cp->acw == 0 && cp->ace == 0) 946 g_do_wither(); 947 } 948 return (error); 949 } 950 951 int 952 g_handleattr_int(struct bio *bp, const char *attribute, int val) 953 { 954 955 return (g_handleattr(bp, attribute, &val, sizeof val)); 956 } 957 958 int 959 g_handleattr_uint16_t(struct bio *bp, const char *attribute, uint16_t val) 960 { 961 962 return (g_handleattr(bp, attribute, &val, sizeof val)); 963 } 964 965 int 966 g_handleattr_off_t(struct bio *bp, const char *attribute, off_t val) 967 { 968 969 return (g_handleattr(bp, attribute, &val, sizeof val)); 970 } 971 972 int 973 g_handleattr_str(struct bio *bp, const char *attribute, const char *str) 974 { 975 976 return (g_handleattr(bp, attribute, str, 0)); 977 } 978 979 int 980 g_handleattr(struct bio *bp, const char *attribute, const void *val, int len) 981 { 982 int error = 0; 983 984 if (strcmp(bp->bio_attribute, attribute)) 985 return (0); 986 if (len == 0) { 987 bzero(bp->bio_data, bp->bio_length); 988 if (strlcpy(bp->bio_data, val, bp->bio_length) >= 989 bp->bio_length) { 990 printf("%s: %s bio_length %jd len %zu -> EFAULT\n", 991 __func__, bp->bio_to->name, 992 (intmax_t)bp->bio_length, strlen(val)); 993 error = EFAULT; 994 } 995 } else if (bp->bio_length == len) { 996 bcopy(val, bp->bio_data, len); 997 } else { 998 printf("%s: %s bio_length %jd len %d -> EFAULT\n", __func__, 999 bp->bio_to->name, (intmax_t)bp->bio_length, len); 1000 error = EFAULT; 1001 } 1002 if (error == 0) 1003 bp->bio_completed = bp->bio_length; 1004 g_io_deliver(bp, error); 1005 return (1); 1006 } 1007 1008 int 1009 g_std_access(struct g_provider *pp, 1010 int dr __unused, int dw __unused, int de __unused) 1011 { 1012 1013 g_topology_assert(); 1014 G_VALID_PROVIDER(pp); 1015 return (0); 1016 } 1017 1018 void 1019 g_std_done(struct bio *bp) 1020 { 1021 struct bio *bp2; 1022 1023 bp2 = bp->bio_parent; 1024 if (bp2->bio_error == 0) 1025 bp2->bio_error = bp->bio_error; 1026 bp2->bio_completed += bp->bio_completed; 1027 g_destroy_bio(bp); 1028 bp2->bio_inbed++; 1029 if (bp2->bio_children == bp2->bio_inbed) 1030 g_io_deliver(bp2, bp2->bio_error); 1031 } 1032 1033 /* XXX: maybe this is only g_slice_spoiled */ 1034 1035 void 1036 g_std_spoiled(struct g_consumer *cp) 1037 { 1038 struct g_geom *gp; 1039 struct g_provider *pp; 1040 1041 g_topology_assert(); 1042 G_VALID_CONSUMER(cp); 1043 g_trace(G_T_TOPOLOGY, "g_std_spoiled(%p)", cp); 1044 cp->flags |= G_CF_ORPHAN; 1045 g_detach(cp); 1046 gp = cp->geom; 1047 LIST_FOREACH(pp, &gp->provider, provider) 1048 g_orphan_provider(pp, ENXIO); 1049 g_destroy_consumer(cp); 1050 if (LIST_EMPTY(&gp->provider) && LIST_EMPTY(&gp->consumer)) 1051 g_destroy_geom(gp); 1052 else 1053 gp->flags |= G_GEOM_WITHER; 1054 } 1055 1056 /* 1057 * Spoiling happens when a provider is opened for writing, but consumers 1058 * which are configured by in-band data are attached (slicers for instance). 1059 * Since the write might potentially change the in-band data, such consumers 1060 * need to re-evaluate their existence after the writing session closes. 1061 * We do this by (offering to) tear them down when the open for write happens 1062 * in return for a re-taste when it closes again. 1063 * Together with the fact that such consumers grab an 'e' bit whenever they 1064 * are open, regardless of mode, this ends up DTRT. 1065 */ 1066 1067 static void 1068 g_spoil_event(void *arg, int flag) 1069 { 1070 struct g_provider *pp; 1071 struct g_consumer *cp, *cp2; 1072 1073 g_topology_assert(); 1074 if (flag == EV_CANCEL) 1075 return; 1076 pp = arg; 1077 G_VALID_PROVIDER(pp); 1078 g_trace(G_T_TOPOLOGY, "%s %p(%s:%s:%s)", __func__, pp, 1079 pp->geom->class->name, pp->geom->name, pp->name); 1080 for (cp = LIST_FIRST(&pp->consumers); cp != NULL; cp = cp2) { 1081 cp2 = LIST_NEXT(cp, consumers); 1082 if ((cp->flags & G_CF_SPOILED) == 0) 1083 continue; 1084 cp->flags &= ~G_CF_SPOILED; 1085 if (cp->geom->spoiled == NULL) 1086 continue; 1087 cp->geom->spoiled(cp); 1088 g_topology_assert(); 1089 } 1090 } 1091 1092 void 1093 g_spoil(struct g_provider *pp, struct g_consumer *cp) 1094 { 1095 struct g_consumer *cp2; 1096 1097 g_topology_assert(); 1098 G_VALID_PROVIDER(pp); 1099 G_VALID_CONSUMER(cp); 1100 1101 LIST_FOREACH(cp2, &pp->consumers, consumers) { 1102 if (cp2 == cp) 1103 continue; 1104 /* 1105 KASSERT(cp2->acr == 0, ("spoiling cp->acr = %d", cp2->acr)); 1106 KASSERT(cp2->acw == 0, ("spoiling cp->acw = %d", cp2->acw)); 1107 */ 1108 KASSERT(cp2->ace == 0, ("spoiling cp->ace = %d", cp2->ace)); 1109 cp2->flags |= G_CF_SPOILED; 1110 } 1111 g_post_event(g_spoil_event, pp, M_WAITOK, pp, NULL); 1112 } 1113 1114 static void 1115 g_media_changed_event(void *arg, int flag) 1116 { 1117 struct g_provider *pp; 1118 int retaste; 1119 1120 g_topology_assert(); 1121 if (flag == EV_CANCEL) 1122 return; 1123 pp = arg; 1124 G_VALID_PROVIDER(pp); 1125 1126 /* 1127 * If provider was not open for writing, queue retaste after spoiling. 1128 * If it was, retaste will happen automatically on close. 1129 */ 1130 retaste = (pp->acw == 0 && pp->error == 0 && 1131 !(pp->geom->flags & G_GEOM_WITHER)); 1132 g_spoil_event(arg, flag); 1133 if (retaste) 1134 g_post_event(g_new_provider_event, pp, M_WAITOK, pp, NULL); 1135 } 1136 1137 int 1138 g_media_changed(struct g_provider *pp, int flag) 1139 { 1140 struct g_consumer *cp; 1141 1142 LIST_FOREACH(cp, &pp->consumers, consumers) 1143 cp->flags |= G_CF_SPOILED; 1144 return (g_post_event(g_media_changed_event, pp, flag, pp, NULL)); 1145 } 1146 1147 int 1148 g_media_gone(struct g_provider *pp, int flag) 1149 { 1150 struct g_consumer *cp; 1151 1152 LIST_FOREACH(cp, &pp->consumers, consumers) 1153 cp->flags |= G_CF_SPOILED; 1154 return (g_post_event(g_spoil_event, pp, flag, pp, NULL)); 1155 } 1156 1157 int 1158 g_getattr__(const char *attr, struct g_consumer *cp, void *var, int len) 1159 { 1160 int error, i; 1161 1162 i = len; 1163 error = g_io_getattr(attr, cp, &i, var); 1164 if (error) 1165 return (error); 1166 if (i != len) 1167 return (EINVAL); 1168 return (0); 1169 } 1170 1171 static int 1172 g_get_device_prefix_len(const char *name) 1173 { 1174 int len; 1175 1176 if (strncmp(name, "ada", 3) == 0) 1177 len = 3; 1178 else if (strncmp(name, "ad", 2) == 0) 1179 len = 2; 1180 else 1181 return (0); 1182 if (name[len] < '0' || name[len] > '9') 1183 return (0); 1184 do { 1185 len++; 1186 } while (name[len] >= '0' && name[len] <= '9'); 1187 return (len); 1188 } 1189 1190 int 1191 g_compare_names(const char *namea, const char *nameb) 1192 { 1193 int deva, devb; 1194 1195 if (strcmp(namea, nameb) == 0) 1196 return (1); 1197 deva = g_get_device_prefix_len(namea); 1198 if (deva == 0) 1199 return (0); 1200 devb = g_get_device_prefix_len(nameb); 1201 if (devb == 0) 1202 return (0); 1203 if (strcmp(namea + deva, nameb + devb) == 0) 1204 return (1); 1205 return (0); 1206 } 1207 1208 #if defined(DIAGNOSTIC) || defined(DDB) 1209 /* 1210 * This function walks the mesh and returns a non-zero integer if it 1211 * finds the argument pointer is an object. The return value indicates 1212 * which type of object it is believed to be. If topology is not locked, 1213 * this function is potentially dangerous, but we don't assert that the 1214 * topology lock is held when called from debugger. 1215 */ 1216 int 1217 g_valid_obj(void const *ptr) 1218 { 1219 struct g_class *mp; 1220 struct g_geom *gp; 1221 struct g_consumer *cp; 1222 struct g_provider *pp; 1223 1224 #ifdef KDB 1225 if (kdb_active == 0) 1226 #endif 1227 g_topology_assert(); 1228 1229 LIST_FOREACH(mp, &g_classes, class) { 1230 if (ptr == mp) 1231 return (1); 1232 LIST_FOREACH(gp, &mp->geom, geom) { 1233 if (ptr == gp) 1234 return (2); 1235 LIST_FOREACH(cp, &gp->consumer, consumer) 1236 if (ptr == cp) 1237 return (3); 1238 LIST_FOREACH(pp, &gp->provider, provider) 1239 if (ptr == pp) 1240 return (4); 1241 } 1242 } 1243 return(0); 1244 } 1245 #endif 1246 1247 #ifdef DDB 1248 1249 #define gprintf(...) do { \ 1250 db_printf("%*s", indent, ""); \ 1251 db_printf(__VA_ARGS__); \ 1252 } while (0) 1253 #define gprintln(...) do { \ 1254 gprintf(__VA_ARGS__); \ 1255 db_printf("\n"); \ 1256 } while (0) 1257 1258 #define ADDFLAG(obj, flag, sflag) do { \ 1259 if ((obj)->flags & (flag)) { \ 1260 if (comma) \ 1261 strlcat(str, ",", size); \ 1262 strlcat(str, (sflag), size); \ 1263 comma = 1; \ 1264 } \ 1265 } while (0) 1266 1267 static char * 1268 provider_flags_to_string(struct g_provider *pp, char *str, size_t size) 1269 { 1270 int comma = 0; 1271 1272 bzero(str, size); 1273 if (pp->flags == 0) { 1274 strlcpy(str, "NONE", size); 1275 return (str); 1276 } 1277 ADDFLAG(pp, G_PF_WITHER, "G_PF_WITHER"); 1278 ADDFLAG(pp, G_PF_ORPHAN, "G_PF_ORPHAN"); 1279 return (str); 1280 } 1281 1282 static char * 1283 geom_flags_to_string(struct g_geom *gp, char *str, size_t size) 1284 { 1285 int comma = 0; 1286 1287 bzero(str, size); 1288 if (gp->flags == 0) { 1289 strlcpy(str, "NONE", size); 1290 return (str); 1291 } 1292 ADDFLAG(gp, G_GEOM_WITHER, "G_GEOM_WITHER"); 1293 return (str); 1294 } 1295 static void 1296 db_show_geom_consumer(int indent, struct g_consumer *cp) 1297 { 1298 1299 if (indent == 0) { 1300 gprintln("consumer: %p", cp); 1301 gprintln(" class: %s (%p)", cp->geom->class->name, 1302 cp->geom->class); 1303 gprintln(" geom: %s (%p)", cp->geom->name, cp->geom); 1304 if (cp->provider == NULL) 1305 gprintln(" provider: none"); 1306 else { 1307 gprintln(" provider: %s (%p)", cp->provider->name, 1308 cp->provider); 1309 } 1310 gprintln(" access: r%dw%de%d", cp->acr, cp->acw, cp->ace); 1311 gprintln(" flags: 0x%04x", cp->flags); 1312 gprintln(" nstart: %u", cp->nstart); 1313 gprintln(" nend: %u", cp->nend); 1314 } else { 1315 gprintf("consumer: %p (%s), access=r%dw%de%d", cp, 1316 cp->provider != NULL ? cp->provider->name : "none", 1317 cp->acr, cp->acw, cp->ace); 1318 if (cp->flags) 1319 db_printf(", flags=0x%04x", cp->flags); 1320 db_printf("\n"); 1321 } 1322 } 1323 1324 static void 1325 db_show_geom_provider(int indent, struct g_provider *pp) 1326 { 1327 struct g_consumer *cp; 1328 char flags[64]; 1329 1330 if (indent == 0) { 1331 gprintln("provider: %s (%p)", pp->name, pp); 1332 gprintln(" class: %s (%p)", pp->geom->class->name, 1333 pp->geom->class); 1334 gprintln(" geom: %s (%p)", pp->geom->name, pp->geom); 1335 gprintln(" mediasize: %jd", (intmax_t)pp->mediasize); 1336 gprintln(" sectorsize: %u", pp->sectorsize); 1337 gprintln(" stripesize: %u", pp->stripesize); 1338 gprintln(" stripeoffset: %u", pp->stripeoffset); 1339 gprintln(" access: r%dw%de%d", pp->acr, pp->acw, 1340 pp->ace); 1341 gprintln(" flags: %s (0x%04x)", 1342 provider_flags_to_string(pp, flags, sizeof(flags)), 1343 pp->flags); 1344 gprintln(" error: %d", pp->error); 1345 gprintln(" nstart: %u", pp->nstart); 1346 gprintln(" nend: %u", pp->nend); 1347 if (LIST_EMPTY(&pp->consumers)) 1348 gprintln(" consumers: none"); 1349 } else { 1350 gprintf("provider: %s (%p), access=r%dw%de%d", 1351 pp->name, pp, pp->acr, pp->acw, pp->ace); 1352 if (pp->flags != 0) { 1353 db_printf(", flags=%s (0x%04x)", 1354 provider_flags_to_string(pp, flags, sizeof(flags)), 1355 pp->flags); 1356 } 1357 db_printf("\n"); 1358 } 1359 if (!LIST_EMPTY(&pp->consumers)) { 1360 LIST_FOREACH(cp, &pp->consumers, consumers) { 1361 db_show_geom_consumer(indent + 2, cp); 1362 if (db_pager_quit) 1363 break; 1364 } 1365 } 1366 } 1367 1368 static void 1369 db_show_geom_geom(int indent, struct g_geom *gp) 1370 { 1371 struct g_provider *pp; 1372 struct g_consumer *cp; 1373 char flags[64]; 1374 1375 if (indent == 0) { 1376 gprintln("geom: %s (%p)", gp->name, gp); 1377 gprintln(" class: %s (%p)", gp->class->name, gp->class); 1378 gprintln(" flags: %s (0x%04x)", 1379 geom_flags_to_string(gp, flags, sizeof(flags)), gp->flags); 1380 gprintln(" rank: %d", gp->rank); 1381 if (LIST_EMPTY(&gp->provider)) 1382 gprintln(" providers: none"); 1383 if (LIST_EMPTY(&gp->consumer)) 1384 gprintln(" consumers: none"); 1385 } else { 1386 gprintf("geom: %s (%p), rank=%d", gp->name, gp, gp->rank); 1387 if (gp->flags != 0) { 1388 db_printf(", flags=%s (0x%04x)", 1389 geom_flags_to_string(gp, flags, sizeof(flags)), 1390 gp->flags); 1391 } 1392 db_printf("\n"); 1393 } 1394 if (!LIST_EMPTY(&gp->provider)) { 1395 LIST_FOREACH(pp, &gp->provider, provider) { 1396 db_show_geom_provider(indent + 2, pp); 1397 if (db_pager_quit) 1398 break; 1399 } 1400 } 1401 if (!LIST_EMPTY(&gp->consumer)) { 1402 LIST_FOREACH(cp, &gp->consumer, consumer) { 1403 db_show_geom_consumer(indent + 2, cp); 1404 if (db_pager_quit) 1405 break; 1406 } 1407 } 1408 } 1409 1410 static void 1411 db_show_geom_class(struct g_class *mp) 1412 { 1413 struct g_geom *gp; 1414 1415 db_printf("class: %s (%p)\n", mp->name, mp); 1416 LIST_FOREACH(gp, &mp->geom, geom) { 1417 db_show_geom_geom(2, gp); 1418 if (db_pager_quit) 1419 break; 1420 } 1421 } 1422 1423 /* 1424 * Print the GEOM topology or the given object. 1425 */ 1426 DB_SHOW_COMMAND(geom, db_show_geom) 1427 { 1428 struct g_class *mp; 1429 1430 if (!have_addr) { 1431 /* No address given, print the entire topology. */ 1432 LIST_FOREACH(mp, &g_classes, class) { 1433 db_show_geom_class(mp); 1434 db_printf("\n"); 1435 if (db_pager_quit) 1436 break; 1437 } 1438 } else { 1439 switch (g_valid_obj((void *)addr)) { 1440 case 1: 1441 db_show_geom_class((struct g_class *)addr); 1442 break; 1443 case 2: 1444 db_show_geom_geom(0, (struct g_geom *)addr); 1445 break; 1446 case 3: 1447 db_show_geom_consumer(0, (struct g_consumer *)addr); 1448 break; 1449 case 4: 1450 db_show_geom_provider(0, (struct g_provider *)addr); 1451 break; 1452 default: 1453 db_printf("Not a GEOM object.\n"); 1454 break; 1455 } 1456 } 1457 } 1458 1459 static void 1460 db_print_bio_cmd(struct bio *bp) 1461 { 1462 db_printf(" cmd: "); 1463 switch (bp->bio_cmd) { 1464 case BIO_READ: db_printf("BIO_READ"); break; 1465 case BIO_WRITE: db_printf("BIO_WRITE"); break; 1466 case BIO_DELETE: db_printf("BIO_DELETE"); break; 1467 case BIO_GETATTR: db_printf("BIO_GETATTR"); break; 1468 case BIO_FLUSH: db_printf("BIO_FLUSH"); break; 1469 case BIO_CMD0: db_printf("BIO_CMD0"); break; 1470 case BIO_CMD1: db_printf("BIO_CMD1"); break; 1471 case BIO_CMD2: db_printf("BIO_CMD2"); break; 1472 case BIO_ZONE: db_printf("BIO_ZONE"); break; 1473 default: db_printf("UNKNOWN"); break; 1474 } 1475 db_printf("\n"); 1476 } 1477 1478 static void 1479 db_print_bio_flags(struct bio *bp) 1480 { 1481 int comma; 1482 1483 comma = 0; 1484 db_printf(" flags: "); 1485 if (bp->bio_flags & BIO_ERROR) { 1486 db_printf("BIO_ERROR"); 1487 comma = 1; 1488 } 1489 if (bp->bio_flags & BIO_DONE) { 1490 db_printf("%sBIO_DONE", (comma ? ", " : "")); 1491 comma = 1; 1492 } 1493 if (bp->bio_flags & BIO_ONQUEUE) 1494 db_printf("%sBIO_ONQUEUE", (comma ? ", " : "")); 1495 db_printf("\n"); 1496 } 1497 1498 /* 1499 * Print useful information in a BIO 1500 */ 1501 DB_SHOW_COMMAND(bio, db_show_bio) 1502 { 1503 struct bio *bp; 1504 1505 if (have_addr) { 1506 bp = (struct bio *)addr; 1507 db_printf("BIO %p\n", bp); 1508 db_print_bio_cmd(bp); 1509 db_print_bio_flags(bp); 1510 db_printf(" cflags: 0x%hx\n", bp->bio_cflags); 1511 db_printf(" pflags: 0x%hx\n", bp->bio_pflags); 1512 db_printf(" offset: %jd\n", (intmax_t)bp->bio_offset); 1513 db_printf(" length: %jd\n", (intmax_t)bp->bio_length); 1514 db_printf(" bcount: %ld\n", bp->bio_bcount); 1515 db_printf(" resid: %ld\n", bp->bio_resid); 1516 db_printf(" completed: %jd\n", (intmax_t)bp->bio_completed); 1517 db_printf(" children: %u\n", bp->bio_children); 1518 db_printf(" inbed: %u\n", bp->bio_inbed); 1519 db_printf(" error: %d\n", bp->bio_error); 1520 db_printf(" parent: %p\n", bp->bio_parent); 1521 db_printf(" driver1: %p\n", bp->bio_driver1); 1522 db_printf(" driver2: %p\n", bp->bio_driver2); 1523 db_printf(" caller1: %p\n", bp->bio_caller1); 1524 db_printf(" caller2: %p\n", bp->bio_caller2); 1525 db_printf(" bio_from: %p\n", bp->bio_from); 1526 db_printf(" bio_to: %p\n", bp->bio_to); 1527 } 1528 } 1529 1530 #undef gprintf 1531 #undef gprintln 1532 #undef ADDFLAG 1533 1534 #endif /* DDB */ 1535